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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Can Communication System - Circuit Tests (1 Of 3) & Diagnostic Codes) >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message [10/2022 - ] >> Procedure

DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message [10/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR OPEN IN CAN MAIN BUS LINES 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Measure the resistance according to the value(s) in the table below.
      GTY1125991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 12 CAN Junction Connector)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C94-8 (CANL) Cable disconnected from negative (-) battery terminal Below 70 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  44

    Result: 

    OK 

    See step  2

  2. CHECK FOR SHORT IN CAN BUS LINES 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1125991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 12 CAN Junction Connector)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C94-8 (CANL) Cable disconnected from negative (-) battery terminal 54 Ω or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  31

    Result: 

    OK 

    See step  3

  3. CHECK FOR SHORT TO +B IN CAN BUS LINE 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1127787Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Component with harness connected
      (No. 12 CAN Junction Connector)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C94-8 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  18

    Result: 

    OK 

    See step  4

  4. CHECK FOR SHORT TO GND IN CAN BUS LINE 
    1. Measure the resistance according to the value(s) in the table below.
      GTY1127789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Component with harness connected
      (No. 12 CAN Junction Connector)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C58-4 (CG) Cable disconnected from negative (-)battery terminal 200 Ω or higher
      C94-8 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    INSPECT FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

    Result: 

    NG 

    See step  5

  5. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the C94 No. 12 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C94-8 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  6

  6. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - NO. 20 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-1 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C94-7 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  12

    Result: 

    OK 

    See step  7

  7. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-4 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C94-10 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  10

    Result: 

    OK 

    See step  8

  8. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-3 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C94-9 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 12 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  11

  9. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the A31 brake actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C94-8 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 

  10. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Disconnect the C36 Engine Stop and Start ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-4 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C94-10 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 

  11. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A16 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-3 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      C94-9 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - ECM) 

  12. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR) 
    1. Disconnect the H89 No. 20 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-1 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      H89-8 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  13

  13. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-3 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      H89-10 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  16

    Result: 

    OK 

    See step  14

  14. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Adaptive Variable Suspension System A
      w/o Adaptive Variable Suspension System B

    Result: 

    B 

    REPLACE NO. 20 CAN JUNCTION CONNECTOR 

    Result: 

    A 

    See step  15

  15. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-5 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      H89-12 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 20 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  17

  16. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Disconnect the H90 No. 1 CAN junction terminal.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-3 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      H89-10 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 

  17. CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Disconnect the H2 absorber control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-5 (CANH) - C58-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      H89-12 (CANL) - C58-4 (CG)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 

  18. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the C94 No. 12 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C94-8 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  22

    Result: 

    OK 

    See step  19

  19. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - NO. 20 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-1 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C94-7 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  25

    Result: 

    OK 

    See step  20

  20. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-4 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C94-10 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  23

    Result: 

    OK 

    See step  21

  21. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-3 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C94-9 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 12 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  24

  22. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the A31 brake actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C94-8 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 

  23. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Disconnect the C36 Engine Stop and Start ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-4 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C94-10 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 

  24. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A16 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-3 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      C94-9 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - ECM) 

  25. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR) 
    1. Disconnect the H89 No. 20 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-1 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      H89-8 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  26

  26. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-3 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      H89-10 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  29

    Result: 

    OK 

    See step  27

  27. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Adaptive Variable Suspension System A
      w/o Adaptive Variable Suspension System B

    Result: 

    B 

    REPLACE NO. 20 CAN JUNCTION CONNECTOR 

    Result: 

    A 

    See step  28

  28. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-5 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      H89-12 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 20 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  30

  29. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Disconnect the H90 No. 1 CAN junction terminal.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-3 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      H89-10 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 

  30. CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Disconnect the H2 absorber control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-5 (CANH) - C58-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      H89-12 (CANL) - C58-16 (BAT)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 

  31. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the C94 No. 12 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C94-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    See step  35

    Result: 

    OK 

    See step  32

  32. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - NO. 20 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-1 (CANH) - C94-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    See step  38

    Result: 

    OK 

    See step  33

  33. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-4 (CANH) - C94-10 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    See step  36

    Result: 

    OK 

    See step  34

  34. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - ECM) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-3 (CANH) - C94-9 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 12 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  37

  35. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the A31 brake actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C94-8 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 

  36. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 
    1. Disconnect the C36 Engine Stop and Start ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-4 (CANH) - C94-10 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - ENGINE STOP AND START ECU) 

  37. CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - ECM) 
    1. Disconnect the A16 ECM connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-3 (CANH) - C94-9 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - ECM) 

  38. CHECK FOR SHORT IN CAN BUS LINES (NO. 20 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR) 
    1. Reconnect the C94 No. 12 CAN junction connector.
    2. Disconnect the H89 No. 20 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-1 (CANH) - H89-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  39

  39. CHECK FOR SHORT IN CAN BUS LINES (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-3 (CANH) - H89-10 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    See step  42

    Result: 

    OK 

    See step  40

  40. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Adaptive Variable Suspension System A
      w/o Adaptive Variable Suspension System B

    Result: 

    B 

    REPLACE NO. 20 CAN JUNCTION CONNECTOR 

    Result: 

    A 

    See step  41

  41. CHECK FOR SHORT IN CAN BUS LINES (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-5 (CANH) - H89-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 20 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  43

  42. CHECK FOR SHORT IN CAN BUS LINES (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Disconnect the H90 No. 1 CAN junction terminal.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-3 (CANH) - H89-10 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 

  43. CHECK FOR SHORT IN CAN BUS LINES (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 
    1. Disconnect the H2 absorber control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-5 (CANH) - H89-12 (CANL) Cable disconnected from negative (-) battery terminal 1 MΩ or higher

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE ABSORBER CONTROL ECU. Refer to  REMOVAL [10/2022 - 08/2023]  , or refer to  REMOVAL [08/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - ABSORBER CONTROL ECU) 

  44. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR) 
    1. Disconnect the C94 No. 12 CAN junction connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-2 (CANH) - C94-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    See step  46

    Result: 

    OK 

    See step  45

  45. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - NO. 20 CAN JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C94-1 (CANH) - C94-7 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 12 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  47

  46. CHECK FOR OPEN IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 
    1. Reconnect the C94 No. 12 CAN junction connector.
    2. Disconnect the A31 brake actuator assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A31-16 (CA2H) - A31-17 (CA2L) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY) 

  47. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 20 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR) 
    1. Reconnect the C94 No. 12 CAN junction connector.
    2. Disconnect the H89 No. 20 CAN junction connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-1 (CANH) - H89-8 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  48

  48. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H89-3 (CANH) - H89-10 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 20 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  49

  49. CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 
    1. Reconnect the H89 No. 20 CAN junction connector.
    2. Disconnect the H90 No. 1 CAN junction terminal.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H90-3 (CANH) - H90-2 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to 
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 CAN JUNCTION TERMINAL 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 20 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION TERMINAL) 

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